Britanya ‏@BritanyaHodge 4mAmazing Race contestants are running around Bridgeport station & are on the Canada Line this morning! #cool

The Canada Line is part of the Vancouver area Sky Train rail system. If you are coming from the North (Vancouver), the route map indicates that Bridgeport Station is where the trains split off to go to Vancouver airport. So, the assumption that they are headed to the airport makes sense.